import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 666
 * Date: 2023-04-19
 * Time: 14:16
 */
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()){
          double a = scanner.nextDouble();
          double b = scanner.nextDouble();
          double c = scanner.nextDouble();

            if(Math.abs(a-b) < c && Math.abs(a-c)<b && Math.abs(b-c)<a){
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        }
    }
}
